This is the document I wrote (and you reviewed) about porting client
drivers to Linux 2.6. The retained name is "porting-clients" (in line
with writing-clients). I won't commit it to i2c/lm_sensors2 CVS, since
that document is of no use outside of the 2.6 kernel (and I'm bored
keeping files in sync).

into kroah.com:/home/greg/linux/BK/i2c-new_drivers-2.6

When doing sync wakeups we must not skip the notification of other cpus
if the task is not on this runqueue.

We need to initialize st->state in tcp_seq_start().  Otherwise
tcp_seq_stop() is run with previous st->state, and it calls the unneeded
unlock etc, causing a kernel crash.

I've got a lot more changes than what's included here.  I've put this
down to the bear minimum to get things working sanely.

Mainly, I just want to get all the people hit by this a chance to use
2.6.0 without having to get our tree. Changes itemized:

 - Fix deadlock possibility in csr.c:read_maps()
 - Fix kmalloc to use ATOMIC in highlevel.c.
 - s/in_interrupt/irqs_disabled/ in ieee1394_transactions.c to fix
   warnings when transactions occured.
 - Introduce a release callback for the host driver and use it correctly.
 - Reorganize the nodemgr probe so we do an initial scan to discover
   devices, check IRM/CycleMaster, then do a final full probe when things
   are kosher. Fixes a problem where device registration and hotplug
   would cause some serious problems when a bus reset was forced in the
   middle of the probe.

into home.osdl.org:/home/torvalds/v2.5/linux

into home.osdl.org:/home/torvalds/v2.5/linux

into home.osdl.org:/home/torvalds/v2.5/linux

There are /proc handles there setup by proc_tty_register_driver, but there is
no module ownership association, so anything that reads after module unload
will blow.

The trivial fix is to propagate the owner of tty_driver to proc entry.

This fixes a small, but important bug in smsc-ircc2.c.

Without this the driver tries release the same region twice.

      Tracked down by Rohit Seth.

Do not special case ENOMEM as an error code, we should free up
the packet for all errors.

Most of the breakage came from cset 1.838.10.3

The br_netfilter_{init,fini}() calls need to be guarded by
BRIDGE_NETFILTER, from Michal Janusz Miroslaw.

When bringing an interface down do not forget to clear the
IF_RS_SENT and IF_RA_RCVD flags.

into home.osdl.org:/home/torvalds/v2.5/linux

This fixes an oops that can occur if JFS is used as the root filesystem.

Writes to a device node may cause a ->write_inode to be called during a
read-only mount.  JFS needs to check for NULL log in jfs_flush_journal. 

into home.osdl.org:/home/torvalds/v2.5/linux

Also, make sure NET_RX_DROP is returned if we did not accept the
packet.

In implementations that use no socket locking, such as RAW sockets,
once we queue the SKB to the socket another cpu can remove the SKB
from the socket queue and free up the SKB making the skb->len access
touch freed memory.

Based upon a report from Burton Windle, kernel bugzilla #937

into home.osdl.org:/home/torvalds/v2.5/linux

Also add some ServerWorks-specific tweaks.

into redhat.com:/spare/repo/libata-2.5

All the users of this function in the SCSI tree call it with the host
lock held.  With the new list traversal code, it was trying to take
the lock again to traverse the list.

Fix it to use the unlocked version of list traversal and modify the
header comments to make it clear that the lock is expected to be held
on calling it.

Noted by Harald Welte (laforge@netfilter.org)

into home.osdl.org:/home/torvalds/v2.5/linux

I've been looking at enforcing lifetime phases for SCSI devices
(primarily to try to get the mid layer to offload as much of the device
creation and hotplug pieces as it can).

I've hijacked the sdev_state field of the struct scsi_device (formerly
this was a bitmap, now it becomes an enumerated state).

I've also begun adding references sdev_gendev into the code to pin the
scsi_device---initially in the queue function, but possibly this should
also be done in the scsi_command_get/put, the idea being to prevent
scsi_device freeing while there's still device activity.

The object phases I identified are:

1. SDEV_CREATED - we've just allocated the device.  It may respond to
internally generated commands, but not to user ones (the user should
actually have no way to access a device in this state, but just in
case).

2. SDEV_RUNNING - the device is fully operational

3. SDEV_CANCEL - The device is cleanly shutting down.  It may respond to
internally generated commands (for cancellation/recovery) only; all user
commands are errored unless they have already been queued (QUEUE_FULL
handling and the like).

4. SDEV_DEL - The device is gone. *all* commands are errored out.

Ordinarily, the device should move through all four phases from creation
to destruction, but moving SDEV_RUNNING->SDEV_DEL because of surprise
ejection should work.

It's starting to look like the online flag should be absorbed into this
(offlined devices move essentially to SDEV_CANCEL and could be
reactivated by moving to SDEV_RUNNING).

I haven't altered the similar bitmap model that scsi_host has, although
this too should probably move to an enumerated state model.

I've tested this by physically yanking a module out from underneath a
running filesystem with no ill effects (other than a slew of I/O
errors).

The obvious problem is that this kills possible user error handling, but
we don't do any of that yet.

into redhat.com:/spare/repo/libata-2.5

This patch is against scsi-bugfixes-2.6. I updated it based on comments
received. It breaks up the reference count initialization for scsi_device
and restores calling slave_destroy for all scsi_devices configured or
not. I ran a small regression using the scsi_debug, aic7xxx, and qla2xxx
driver. I also had a debug patch for more verbose kobject cleanup and
patch for a badness check on atomic_dec going negative (previously
provided by Linus).

The object cleanup appears to being functioning correctly. I only saw
previously reported badness output:
	- Synchronizing SCSI cache fails on cleanup.
	- scsi_debug.c missing release (I believe Doug posted a patch)
	- aic7xxx warnings on rmmod due to ahc_platform_free calling
	  scsi_remove_host with ahc_list_lock held.


This patch splits the scsi device struct device register into init and
add. It also addresses memory leak issues of not calling slave_destroy
on scsi_devices that are not configured in.

Details:
* Make scsi_device_dev_release extern for scsi_scan to use in
alloc_sdev.
* Move scsi_free_sdev code to scsi_device_dev_release. Have
previous callers of scsi_free_sdev call slave_destroy plus put_device.
* Changed name of scsi_device_register to scsi_sysfs_add_sdev to
match host call and align with split struct device init.
* Move sdev_gendev device and class init to scsi_alloc_sdev.

Thu Nov 20 22:56:11 PST 2003

 drivers/scsi/scsi_priv.h  |    4 +-
 drivers/scsi/scsi_scan.c  |   63 +++++++++++++++++++++-------------------------
 drivers/scsi/scsi_sysfs.c |   58 ++++++++++++++++++++++--------------------
 3 files changed, 62 insertions(+), 63 deletions(-)

It turns out that the SiS irq routing logic doesn't go by chipset
after all - it's just that some pirq entries are "legacy" numbers,
while others are raw offsets into PCI config space (and the legacy
numbers are more commonly used with the older chipsets, which
explains the correlations).

This simplifies the router code substantially.

A bug prevents the PnP layer from reserving some of the resources
specified by the PnPBIOS.  As a result some systems will have
unpredicable (random crashes etc.) problems because of resource
conflicts, especially when PCMCIA support is enabled.  This patch
fixes the problem by ensuring that the proper resource data is
reserved.